Tetris in the sky: Gamers play on Philly building

The classic video game Tetris is played on the 29-story Cira Centre in Philadelphia, Saturday, April 5, 2014, using hundreds of LED lights embedded in its glass facade. The spectacle kicks off a citywide series of events called Philly Tech Week and also celebrates the upcoming 30th anniversary of Tetris. (AP Photo/ Joseph Kaczmarek)
Photo by Associated Press